关系模型的力量在于其简单性和通用性。

The lightning that precedes the thunder is a common image of the warnings that come before calamity.

The problem of the modern age is the problem of the individual's self-preservation in the face of the overwhelming power of the social mechanism.

我只和自己竞争，不和别人竞争。

数学的美只向更有耐心的追随者展示。

Good market design aligns individual incentives with social efficiency.

不用圆规和曲尺，就不能画出方形和圆形。比喻做事要遵循一定的法则。

The needs of farmers are the direction of our scientific research.